Town Of Westford, Wisconsin climate: Climate normals at a NOAA weather station
Town Of Westford's normal year runs from 8°F January nights to 81°F July afternoons, with 37.8 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.4°C, January lows of −13°C, July highs of 27°C, 960 mm of precipitation a year.
- NOAA stationTown Of Westford
- Station IDUSC00478540
- Location43.47°N 88.88°W
- Elevation879 ft (268 m)
On October 24, the normal high in Town Of Westford is 55°F and the normal low 36°F, and the chance of measurable rain or snow is 37%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Town Of Westford.
- Jan 25° 8°
- Feb 29° 11°
- Mar 41° 22°
- Apr 55° 34°
- May 68° 47°
- Jun 78° 56°
- Jul 81° 60°
- Aug 79° 58°
- Sep 72° 50°
- Oct 59° 39°
- Nov 44° 27°
- Dec 31° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Town Of Westford each month?
July is the warmest month, with normal highs of 81°F; January the coldest, with normal lows of 8°F. The most precipitation falls in June (5.00 in), the least in January (1.64 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 25°F | 8°F | 16.8°F | 1.64 | 11 | <1 | 30 | 9 h 20 min |
| February | 29°F | 11°F | 20.1°F | 1.68 | 11 | <1 | 28 | 10 h 30 min |
| March | 41°F | 22°F | 31.8°F | 2.43 | 10 | <1 | 26 | 11 h 50 min |
| April | 55°F | 34°F | 44.7°F | 3.77 | 13 | <1 | 13 | 13 h 20 min |
| May | 68°F | 47°F | 57.2°F | 4.42 | 13 | 1 | 1 | 14 h 40 min |
| June | 78°F | 56°F | 67.0°F | 5.00 | 12 | 1 | <1 | 15 h 20 min |
| July | 81°F | 60°F | 70.6°F | 4.14 | 11 | 3 | <1 | 15 h 10 min |
| August | 79°F | 58°F | 68.9°F | 3.75 | 11 | 1 | <1 | 14 h |
| September | 72°F | 50°F | 61.1°F | 3.57 | 11 | <1 | <1 | 12 h 30 min |
| October | 59°F | 39°F | 48.7°F | 3.12 | 12 | <1 | 8 | 11 h 10 min |
| November | 44°F | 27°F | 35.3°F | 2.34 | 10 | <1 | 22 | 9 h 40 min |
| December | 31°F | 15°F | 23.1°F | 1.95 | 12 | <1 | 29 | 9 h |
| Year (annual) | 55°F | 36°F | 45.4°F | 37.81 | 136 | 5 | 157 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −4°C | −13°C | −8.4°C | 42 mm |
| February | −2°C | −12°C | −6.6°C | 43 mm |
| March | 5°C | −5°C | −0.1°C | 62 mm |
| April | 13°C | 1°C | 7.1°C | 96 mm |
| May | 20°C | 8°C | 14.0°C | 112 mm |
| June | 25°C | 14°C | 19.4°C | 127 mm |
| July | 27°C | 16°C | 21.4°C | 105 mm |
| August | 26°C | 15°C | 20.5°C | 95 mm |
| September | 22°C | 10°C | 16.2°C | 91 mm |
| October | 15°C | 4°C | 9.3°C | 79 mm |
| November | 7°C | −3°C | 1.8°C | 59 mm |
| December | 0°C | −9°C | −4.9°C | 50 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Beaver Dam (3 miles away), gets 43 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00478540; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Town Of Westford?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, August has the fewest days with rain (11).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00478540.
When is the last frost at Town Of Westford?
In Town Of Westford, the last spring frost (32°F) comes after May 1 in half of years and after May 16 in one year in ten; the first autumn frost comes before October 11 in half of years and before September 27 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 11 year in 10 after May 16; 9 in 10 after April 16
- First autumn frost, half of years before
- October 111 year in 10 before September 27; 9 in 10 before October 25
NOAA puts the median frost-free season at 163 days, and the season without a hard freeze (28°F) at 184 days.
A hard freeze (28°F) comes after April 19 in half of springs and before October 22 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Town Of Westford in zone 5a in ZIP code 53916, the nearest ZIP area.
Frost dates for every NOAA station in Wisconsin · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00478540; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at Town Of Westford?
In a normal year in Town Of Westford, 5 days a year reach 90°F, 157 nights fall to 32°F or colder and 136 days bring measurable precipitation.
- Days at 90°F or more
- 5a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 157a normal year
- Days that stay below freezing
- 71high of 32°F or less
- Days with 0.01 inch of precipitation
- 136a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00478540.
How sunny is it at Town Of Westford?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds at Town Of Westford, 3.8 kWh per square metre a day. July is the sunniest month (80%) and December the cloudiest (59%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 63% | 1.6 |
| February | 70% | 2.7 |
| March | 70% | 3.7 |
| April | 68% | 4.6 |
| May | 71% | 5.5 |
| June | 76% | 6.1 |
| July | 80% | 6.3 |
| August | 78% | 5.3 |
| September | 77% | 4.2 |
| October | 68% | 2.7 |
| November | 66% | 1.8 |
| December | 59% | 1.3 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Town Of Westford record?
A normal year at Town Of Westford brings 7,601 heating degree days, 41% more than the median U.S. place (5,373), and 513 cooling degree days, 43% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,497 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,494 | 0 |
| February | 1,256 | 0 |
| March | 1,030 | 1 |
| April | 610 | 1 |
| May | 268 | 28 |
| June | 48 | 108 |
| July | 12 | 184 |
| August | 22 | 141 |
| September | 163 | 47 |
| October | 509 | 4 |
| November | 891 | 0 |
| December | 1,299 | 0 |
| Year (annual) | 7,601 | 513 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00478540. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Have recent years at Town Of Westford been warmer than normal?
2025 averaged 45.9°F, 0.5°F above the 1991-2020 normal of 45.4°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 46.7°F | +1.3°F | 29.55 |
| 2022 | 44.5°F | −0.9°F | 37.51 |
| 2023 | 47.6°F | +2.2°F | 34.37 |
| 2024 | 48.6°F | +3.2°F | 49.41 |
| 2025 | 45.9°F | +0.5°F | 32.61 |
Source: observed years: ACIS, station USC00478540. A year counts only with all twelve months complete.
How does Town Of Westford's climate compare?
Town Of Westford is warmer than 91 of the 165 places with their own NOAA record in Wisconsin, and wetter than 142. Across the 7,247 U.S. stations with normals, its annual mean of 45.4°F is warmer than 21%.
In the Köppen classification computed from these normals, Town Of Westford is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Town Of Westford share this climate record?
4 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Waupun, WI11,131 people · 13 mi NE
- Fall River, WI1,853 people · 10 mi SW
- Randolph, WI1,762 people · 8 mi NW
- Fox Lake, WI1,682 people · 6 mi N
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Town Of Westford's climate
What is the coldest month at Town Of Westford?
January, with a normal high of 25°F and a normal low of 8°F. The warmest is July (81°F by day, 60°F at night).
Does it snow at Town Of Westford?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Beaver Dam (3 miles away), records 43 inches of snow in a normal year.
What is the rainiest month at Town Of Westford?
June, with 5.00 in of precipitation in a normal year; the driest is January with 1.64 in.
What plant hardiness zone is Town Of Westford in?
The USDA's 2023 map puts Town Of Westford in zone 5a in ZIP code 53916, the nearest ZIP area.
How late can frost come at Town Of Westford?
In half of years the last 32°F night comes after May 1; in one year in ten it comes after May 16. Waiting until May 16 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wisconsin climateThe statewide normals and every place in the state
- Beaver Dam, WI2 miles from this station, 44.9°F a year
- Horicon, WI13 miles from this station, 45.2°F a year
- Hustisford, WI17 miles from this station, 46.3°F a year
- Markesan, WI17 miles from this station, 45.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made